add streamline plots

[highfieldjames]

Streamline plots are implemented in the Python and Matlab distributions of Plotly. Is the implementation of this plot type in Plotly.js on the current roadmap? If not, please consider this a feature request.

[henryJack]

Streamline plots are really useful for displaying scalar and vector fields, is there any update on this? It would be an awesome feature!

[jackparmer]

3D streamtubes and cone plots are currently development in plotly.js, here is a preview:

If your company is available cosponsor a 2d effort, please reach out

[henryJack]

These look absolutely glorious. Can't wait for the full release

[jackparmer]

The 3d versions were completed several years ago, sorry this issue was never updated:

• https://plotly.com/python/cone-plot/ | https://plotly.com/javascript/cone-plot/
• https://plotly.com/python/streamtube-plot/ | https://plotly.com/javascript/streamtube-plot/

2d Plotly streamline plots currently still only exist for Python. There are no plans currently for a native plotly.js 2d streamline trace type.

[asgolovin]

Hey, any news on this? :) We need a js version of streamline plots for a project I'm working on, so I will work on implementing at least a script to compute and draw streamlines using existing scatter plots. The optimistic plan would be to create a new trace type and open a PR, but let's see how the first step goes and where it leaves my ambitions. 😅 Do I understand it correctly that it is possible to add a trace type which internally uses existing drawing functions like scatter? If so, can someone point me to an example of a trace type which does something similar? :)

For the algorithm, I was looking at the Matplotlib implementation which uses the second-order Heun's method with an adaptive step size. They argue in the comments that the Heun's method is preferable in this case to the non-adaptive RK4 method which is used in the plotly's python implementation. In the hypothetical case that this work does lead to a PR - do you guys have any strong opinions on the matter?